/**
 * Created by shenc on 2016/9/13.
 */

/*

 <div class="camera-area">
 <form enctype="multipart/form-data" method="post">
 <input type="file" name="fileToUpload" class="fileToUpload" accept="image/*" capture="camera"/>
 <div class="upload-progress"><span></span></div>
 </form>
 <div class="thumb"></div>
 </div>

 $(".camera-area").fileUpload({
 "url": "savetofile.php",
 "file": "myFile"
 });

 */
(function($) {
    $.extend($.fn, {
        fileUpload: function(opts) {
            this.each(function() {
                var $self = $(this);
                var doms = {
                    "fileToUpload": $self.find(".fileToUpload"),
                    "thumb": $self.find(".thumb"),
                    "progress": $self.find(".ui-progress")
                };
                var index=0;
                var funs = {
                    //选择文件，获取文件大小，也可以在这里获取文件格式，限制用户上传非要求格式的文件
                    "fileSelected": function() {
                        var files = (doms.fileToUpload)[0].files;
                        var count = files.length;
                        for (var index = 0; index < count; index++) {
                            var file = files[index];
                            var fileSize = 0;
                            if (file.size > 1024 * 1024)
                                fileSize = (Math.round(file.size * 100 / (1024 * 1024)) / 100).toString() + 'MB';
                            else
                                fileSize = (Math.round(file.size * 100 / 1024) / 100).toString() + 'KB';
                        }
                        funs.uploadFile();
                    },
                    //异步上传文件
                    uploadFile: function() {
                        var fd = new FormData();//创建表单数据对象
                        var files = (doms.fileToUpload)[0].files;
                        var count = files.length;
                        for (var index = 0; index < count; index++) {
                            var file = files[index];
                            fd.append(opts.file, file);//将文件添加到表单数据中
                        }
                        if(count==0) return false;
                        // fd['_token']=_token;
                        var xhr = new XMLHttpRequest();
                        xhr.responseType = "json";
                        xhr.upload.addEventListener("progress", funs.uploadProgress, false);//监听上传进度
                        xhr.addEventListener("load", funs.uploadComplete, false);
                        xhr.addEventListener("error", opts.uploadFailed, false);
                        xhr.open("POST", opts.url+'?_token='+_token);
                        // xhr.setRequestHeader("Content-type","application/x-www-form-urlencoded");
                        console.log(fd);
                        xhr.send(fd);
                    },
                    //文件预览
                    previewImage: function(file) {
                        var tpl='<li>'
                            +'<div class="ui-grid-trisect-img">'
                            +'<span style="background-image:url('+file.url+')"></span>'
                            +'<input class="J-id" name="image_url['+index+']" type="hidden" value="'+file.id+'">'
                            +'<i class="ui-icon-close ui-txt-warning" style="position: absolute;right: 0;top:0;z-index: 10;line-height: 32px;"></i>'
                            +'</div>'
                            +'</li>';
                        tpl = $(tpl);
                        doms.thumb.append(tpl);
                    },
                    uploadProgress: function(evt) {
                        if (evt.lengthComputable) {
                            doms.progress.show();
                            var percentComplete = Math.round(evt.loaded * 100 / evt.total);
                            doms.progress.find("span").css("width",percentComplete.toString() + '%');
                            // doms.progress.html(percentComplete.toString() + '%');
                        }
                    },
                    "uploadComplete": function(evt) {
                        doms.progress.hide();
                        if(this.status == 200||this.status == 304){
                            console.log(this.response);
                            funs.previewImage(this.response);
                            index++;
                        }
                    }
                };
                doms.fileToUpload.on("change", function() {
                    doms.progress.find("span").width("0");
                    funs.fileSelected();
                });
            });
        }
    });
})(Zepto);
